<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=468167
-->
<head>
  <title>Test for Bug 468167</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=468167">Mozilla Bug 468167</a>
<p id="display">
<textarea id="ta" rows="10" cols="80"></textarea>
</p>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 468167 **/

SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(runTests);

function runTests()
{
  var ta = document.getElementById("ta");
  ta.focus();
  is(ta.scrollTop, 0, "initially scrolled to top");
  var s = "";
  for (var i = 0; i < 40; ++i) {
    // three characters per line
    if (i < 10)
      s += "0";
    s += i + "\n";
  }
  ta.value = s;
  is(ta.scrollTop, 0, "scrolled to top after adding content");
  ta.scrollTop = 9999; // scroll down as far as we can
  isnot(ta.scrollTop, 0, "scrolled down after scrolling down");

  ta.setSelectionRange(0, 99); // 33 lines out of 40

  // Send a backspace key event to delete the selection
  synthesizeKey("VK_BACK_SPACE", { });

  is(ta.scrollTop, 0, "scrolled to top after deleting selection");

  SimpleTest.finish();
}

</script>
</pre>
</body>
</html>
